Laminated spring



' July 14, 1931. s. GROSS 1 14,214

LAMINATED SPRING Filed Aug. 3, 1928 Patented July 14, 1931' burn-:1)STATES;

PAT NT OFFICE SIEGFRIED GROSS, OF ESSEN, GERMANY, ASSIGNOR TO FRIED.KRU'PP AKTIENGESELL- SCI-IAFT, OF ESSEN-ON-THE-RUHR, GERMANY LAMINATEDSPRING- Application flled August 3, 1928, Serial No.

The invention relates to laminated springs, more particularly to springsintended for vehicles and consists primarily in making the individualspring elements of equal length, as Well-known, but in designing them atleast v approximately as bodies of uniform strength with varyingthickness, so that they do not touch each other upon the spring systembeing loaded.

In order that the invention maybe more I easily understood, anembodiment of the subject-matter of the same is illustrated by way ofexample in the drawings which accompany and form part of thisspecification. In the drawings.

Figure l is an elevation of the first embodlment,

Figure 2 is the corresponding top view,

Figure 3 is a section on line 33 of Figure 2 on an enlarged scale,

Figure 4 is a detail of Figure 3, seen from the left.

Referring now to Figures 14, all of the spring elements D, D are ofequal length and uniform width, while their thickness decreases from theband C towards their free ends approximately according to a commonparabola. The uppermost and lowermost elements D of the system have eyeson each end that embrace pins 0 of heads E, see Figure 3. The free endsof the remaining spring elements D engage with play recesses e providedin the heads E. Pins 6 Figure 3, of heads E serve to connect thelatter'with the rigging.

Upon the described spring system being loaded, the heads E shiftparallel to the band C. lVhen this takes place, sliding friction arisesonly between the-eyes d of the spring' elements D and pins 6, While theelements D roll on the rounded-off edges of the recesses 6 Consequentlythe system exerts a spring action even with slight shocks, this beingimpossible with the known laminated springs, due to the internalfriction existing between the individual spring elements. Besides this,compared to an ordinary spring of the same length, same number ofelements, same thickness of the latter in the midst, and, with the sameload as one of the known spring sys- 297,210, and in Germany October 27,1927.

terms, the described spring system possesses secure by Let-- ness fromtheir centers, said spring plates on contacting at their centers, meansrigidly uniting said plates, and head pieces rotatably engaging the endsof'at least two of said plates and having supports for the ends ofthe-other spring plates.

2. In a spring system individual spring plates of equal length anddiverging thickness from their centers, said spring platescontacting attheir centers, means rigidly uniting and distancing said plates, andhead pieces rotatably engaging the ends of at least two of said platesand having rounded faces loosely supporting the ends of the other. sprinplates.

3. n a spring system a stack of individual spring plates of equal lengthand diverging thickness from their centers, said spring platescontacting at their centers, mounting means rigidly connecting anddistancing said spring plates, and mounting supports rotatably engagingthe ends of two of said plates and having recesses with rounded edgesabutting with the ends of the other plates.

The foregoing specification signed at Cologne, Germany, this 20th day ofJuly,

. 'SIEGFRIED GROSS.

